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US 7,125,220 B2Granted
Axial-flow type fan having an air outlet blade structure
AssigneeSunonwealth Electric Machine Industry Co., Ltd.
InventorsAlex Horng, Yin-Rong Hong
Life of this patent
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Abstract
An axial-flow type fan includes a fan housing consisting of an air inlet, an air outlet and an air channel, and a fan wheel consisting of a hub and fan blades. The air channel of the fan housing accommodates the fan wheel which has end-cornered cutting blades proximate the air outlet of the fan housing. When the fan wheel is rotated, the end-cornered cutting blades are able to eliminate air turbulence and air noise in the air outlet of the fan housing.
Claims7
An axial-flow type fan, comprising:
- a fan housing including an air inlet and an air outlet at its outer side, said air outlet having an air-expanding section for expanding an exhausting airflow exhausting from the air outlet;
- an air channel connecting the air inlet and the air outlet;
- a fan wheel received in the channel and including a hub;
- and
- a plurality of fan blades arranged about a rotary axis of the fan wheel and tilted on the hub, and each of the fan blades having an end-cornered cutting section, each of said end-cornered cutting sections having a leading point substantially aligned with a starting point of the air-expanding outlet, thereby reducing air turbulence on a surface of the air-expanding outlet;
- wherein when the fan wheel is rotated, the end-cornered cutting sections of the blades are able to eliminate air turbulence and air noise in the air outlet of the fan housing.
3 more elements
Dependencies are inferred from the claim text.